Section for Forest, Nature and Biomass – University of Copenhagen

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Ingeborg Callesen

Ingeborg Callesen


I have worked with terrestrial ecosystem research since 1994, and until 2006 specializing in forest soil science and forest ecology based on field experimentation, field observation (tree growth, phenology, pedology, forest site classification), and statistical modeling using soil databases. Main subjects are carbon storage and cycling, nitrogen storage and leaching from forest ecosystems soil C and N interactions with macro climate, and management aspects of bioenergy including assessment of biomass potential and bioash application. 

The experimental research methods have focused on soil chemistry and soil water chemistry in old common garden experiments established by the Danish Forest and Landscape Research Institute in the 1960ies and 1970ies, and observational monitoring data (national nitrate monitoring 1986-1993). In 2007 I included sustainability science in my research portfolio putting focus on the bioenergy sector in a cross disciplinary team work including environmental and energy economics. In the following post doc project management engineering and life cycle impact assessment was combined with experimental climate change research putting focus on climate change effects on ecosystem services. 

During my entire research life effects of nitrogen on ground water quality and nitrogen cycling in forest ecosystems has been a continued effort, including the interpretation of the natural abundance of the stable isotope 15N in litter and soil fractions of broadleaved treespecies. 

The work with sustainability assessment (2007-) has led to the insight that interpretation of systems rely on the world views and nature views incorporated in them and may imply the existence of parallel knowledges and paradigms. Research cooperation with the humanities and arts, and social sciences e.g. bioethics, ecological economics and environmental economics is warranted to examine the multi-facetted aspects of the human-nature interaction. The concepts of 'ecosystem health', 'ecosystem damage' and 'ecosystem services' e.g. can only exist in a cross disciplinary context.

Current research


Sinks2: Soil carbon in Danish forests– data consolidation and model development. Danish energy agency 2014 - 2021

Oak health: Site classification of oak stands in poor health. Role project scientist. Danish Nature Agency 2015 - 2017

Geosmart cities 2016-2017. Role: steering committee. MUDP

Selected publications

  1. Published

    Soil carbon stock change in the forests of Denmark between 1990 and 2008

    Callesen, I., Stupak, I., Georgiadis, P., Johannsen, V. K., Østergaard, H. S. & Vesterdal, L. 2015 In : Geoderma Regional. 5, p. 169-180 12 p.

    Publication: Research - peer-reviewJournal article

  2. Published

    Carbon storage and nutrient mobilization from soil minerals by deep roots and rhizospheres

    Callesen, I., Harrison, R., Stupak, I., Hatten, J., Raulund-Rasmussen, K., Boyle, J., Clarke, N. & Zabowski, D. 2016 In : Forest Ecology and Management. 359, p. 322–331

    Publication: Research - peer-reviewJournal article

  3. Published
  4. Efficient use of reactive nitrogen for cultivation of bioenergy: less is more

    Callesen, I., Carter, M. S. & Ostergard, H. 1 Apr 2011 In : Global Change Biology. Bioenergy. 3, 2, p. 171-179 9 p.

    Publication: Research - peer-reviewJournal article

  5. Optimization of bioenergy yield from cultivated land in Denmark

    Callesen, I., Grohnheit, P. E. & Ostergard, H. 1 Sep 2010 In : Biomass & Bioenergy. 34, 9, p. 1348-1362 15 p.

    Publication: Research - peer-reviewJournal article

  6. Long-term development of nitrogen fluxes in a coniferous ecosystem: Does soil freezing trigger nitrate leaching?

    Callesen, I., Borken, W., Kalbitz, K. & Matzner, E. 1 Apr 2007 In : Journal of Plant Nutrition and Soil Science. 170, 2, p. 189-196 8 p.

    Publication: Research - peer-reviewJournal article

  7. Published

    Dissolution of granulated wood ash examined by in situ incubation: Effects of tree species and soil type

    Callesen, I., Ingerslev, M. & Raulund-Rasmussen, K. 1 Oct 2007 In : Biomass & Bioenergy. 31, 10, p. 693-699 7 p.

    Publication: Research - peer-reviewJournal article

  8. Published

    Carbon and nitrogen in Danish forest soils - Contents and distribution determined by soil order

    Vejre, H., Callesen, I., Vesterdal, L. & Raulund-Rasmussen, K. 2003 In : Soil Science Society of America. Journal. 67, 1, p. 335-343 8 p.

    Publication: Research - peer-reviewJournal article

  9. Published

    Soil carbon stores in Nordic well-drained forest soils - relationships with climate and texture class

    Callesen, I., Liski, J., Raulund-Rasmussen, K., Olsson, M., Tau-Strand, L., Vesterdal, L. & Westman, C. J. Mar 2003 In : Global Change Biology. 9, 3, p. 358-370

    Publication: Research - peer-reviewJournal article

ID: 45789782